doubt regarding DT2821 (ao_waveform error)

I am using DT2821 board and configured comedi-0.7.64
and comedilib-0.7.18. All configured fine and when we
try to execute the ./info it shows the 3 available
subdivices. But when we try to execute the ao_waveform
it gives the error as : 

comedi_comnand : Resource temporarily unavailable.

I would be thankful if anybody could give me some
ideas to rectify this error.

Thanks in advance.

Senthilkumar

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Received on 2002-07-31Z10:30:09